从微观视角对老城区环高校圈楼宇经济进行定量解析并描述企业分布的垂直特征。以位于南京老城区的东南大学四牌楼校区为例,引入生态学研究中分析生物群落优势度指数、多样性指数、均匀度指数等方法描述其楼宇经济特征,通过单因素方差分析、线性回归和多元Logistic回归方法等探索楼宇空间企业分布的垂直特征。研究发现：①伴随着高校知识的外溢,东南大学四牌楼校区周边集聚了以知识密集型行业为主的生产性服务业优势行业种群。②研究区整体企业群落具有较高的多样性,群落结构相对稳定,依据多样性指数和均匀度指数的高低可以将商务楼宇分为四类,不同类型商务楼宇在行业多元化和单一行业集聚度上具有相似特征,此外,与企业多样性相比,企业多度在垂直空间上更能呈现出一定的差异性。③企业规模、行业种群、企业所处楼宇属性是企业垂直分异的重要影响因素,且随着楼宇层数从低到高,楼宇的开放性、可达性不断降低,可以总结出楼宇企业从大众化企业向专业化企业、从对外租用办公空间向建设公司自用办公空间的分布规律。
This paper presents a quantitative analysis of the building economy in the university circle of the old town from the microscopic perspective and describes the vertical spatial characteristics of enterprise distribution. Taking the Sipailou campus of Southeast University in the old town of Nanjing as a case study,this paper introduces ecological methods,such as the species dominance index,diversity index,and evenness index analysis,to describe the characteristics of building economy. Furthermore,the paper explores the vertical distribution of enterprises in buildings through ANOVA,linear regression,and multiple Logistic regression. The results indicate the following: 1) Along with the spillover of university knowledge,the old town has witnessed the clustering of advantageous sector groups,particularly production services such as knowledge-intensive industries,in the Sipailou campus of Southeast University circle. 2) The enterprise cluster demonstrates high diversity and a relatively stable structure within the study area. Business buildings can be categorized into four types based on the diversity and uniformity indexes. Different types of business buildings exhibit similar industry diversification and single-industry clustering characteristics. Additionally,in comparison to company diversity,company multiplicity displays greater differentiation in the vertical space. 3) Enterprise size,industry groups,and the building in which they are located significantly influence vertical differentiation among enterprises. As the number of floors in a building increases from low to high,the openness and accessibility of buildings continue to decrease. Consequently,enterprises tend to shift from mass-market orientation to specialized focus,as well as transition from leasing office space to constructing company-owned office spaces.
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